Sometimes I wonder if it’s better not to be hopeful

I’m a total romantic and when I start dating someone I tend to idealize them and imagine all sorts of scenarios for our future and just having fun together. This always ends up blowing up in my face and I feel even more devastated by each breakup because my hope for where the relationship was going was crushed. Is it better to expect nothing so that when things go nowhere I’m less upset lol? Seems a pretty grim way to live but as a 28F I’m finding it harder and harder to bounce back from the crushing feeling of things not working out the way I hoped.